docs: def __query_options(self):
          """Get the query options string to use for this query."""
          options = 0
          if self.__tailable:
              options |= _QUERY_OPTIONS["tailable_cursor"]
          if self.__slave_okay or self.__pool._slave_okay:
              options |= _QUERY_OPTIONS["slave_okay"]
          if not self.__timeout:
              options |= _QUERY_OPTIONS["no_timeout"]
          return options